certified consultant; diagnostic specialist
A professional title for a certified consultant or diagnostician in a specific field, often part of a longer qualification name (e.g., 中小企業診断士, キャリアコンサルティング技能士). Used as a suffix or standalone noun.
He holds the qualification of a certified small and medium enterprise consultant.
To become a certified consultant, you need to pass the national exam.
small and medium enterprise management consultant
Compound of 診断 (diagnosis) + 士 (professional suffix). The exact historical derivation is uncertain, but the term follows the common pattern of Japanese professional titles.